KEY TO THE WATER BIRDS OK ]<LORIDA. 



16=; 



Length, 28; Wing, 16 ; Bill, 2.20; Tarsus, 3. 10. Head 



white; rest of plumage grayish. Chen caerulescens. 



Blue Goose. See page 237 



Length, 28; Wing, 16; Bill, 2; Tarsus, 2.90. Head 

 brownish; bill yellowish; nail black. A line of 

 white at base of bill (adult). Anser alblfrons gambeli. 



American White=fronted Goose. 

 See pa:ge 238 

 Length, 26: Wing, 13.50: Bill, 1.40: larsus, 2.40. 



Head entirely black ; bill black. Branta bernicla. 



Brant. See page 240 



SUBFA.MILV CYGNIN^E. SWAN.S. 



Olor columbianus. 



Length, 53; Wing, 21.50; Bill, 4; Tarsus, 4.20. 

 Distance from front of the eye to nostril longer 

 than from nostril to tip of bill. A spot of yellow 

 on the lores in the adult; young birds gray. En= 

 tire plumage white. 



Olor columbianus. 



Whistling Swan. See page 240 



